Flexible form with good options for free version

I’ve used the CRM Perks form builder on multiple sites and found it to include a bunch of useful easy-to-use options built-in such as pop-ups, multiple form notifications, and other customisations, that other free form plugins often do not include. I have replaced multiple plugins from different sources with CRM Perks. It’s a well coded plugin that takes a little while to work through the settings but is worth the effort.